Suppression List Management

Suppression file abuse is a significant source of spam. The simple act of encrypting these files makes this sort of abuse more difficult. The ESPC is implementing a membership requirement that members should support MD5 suppression file encryption. It is our hope that adoption of this standard will not only help reduce spam, but also drive broader encryption adoption within the industry.

ESPC Suppression File Encryption Standard

ESPC Suppression File Encryption FAQ